Hartika, Gita, Zulharmita Zulharmita, and Ridho Asra. “Utilization of Natural Dyes Substances for Histological Staining: A Review”. Asian Journal of Pharmaceutical Research and Development 9, no. 1 (February 15, 2021): 149–158. Accessed June 27, 2026. https://mail.ejfa.me/index.php/journal/article/view/925.